Hi everyone 
This is a general bugfix release that addresses issues with Ionic 4 plus adds a couple small improvements for ease of use.
See the complete list of changes below:
Calendar
NEW
- We improved the Navigate method to support ISO strings and moment.js objects.
- We added a new
updateEventmethod that makes updating events easier. You won’t need to remove and re-add events, everything is handled in the background.
FIXED
- We fixed an issue where the wrong date was selected if
minormaxwas set anddateFormatdid not contain the year (#456).
General
FIXED
- We fixed an bug that caused trouble across all pickers linked to
ion-inputcomponents in Ionic 4. Controls didn’t open on first input tap.
Listview
FIXED
- A bug got fixed that caused an exception if the
removemethod was called for an already removed element. The same error occurred in the Angular implementation of the hierarchical listview, when the host component got destroyed.
- Check out the full changelog.
- Upgrading from v3 to v4? See the upgrade guide .